Question

Which property of white phosphorus is common to red phosphorus?

• A. It burns when heated in air.
• B. It reacts with hot caustic soda solution to give phosphine.
• C. It shows chemiluminescence.
• D. It is soluble in carbon disulphide.

Hint:

White phosphorus is more reactive than red phosphorus, but both can burn in air.

Answer 1

The Correct Option is A

Step 1: Understanding the properties of phosphorus allotropes. 
- White phosphorus is highly reactive and catches fire in air. 
- Red phosphorus is more stable but can still burn in air under sufficient heating. 
Step 2: Identifying the common property. 
- White and red phosphorus both burn when heated in air, making option (A) correct.